<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>列表排序</title>
    <script src="../../js/vue.js"></script>
</head>
<body>
<div id="root">
    <h2>人员列表</h2>
    <label>
        <input type="text" placeholder="请输入名字" v-model="keyWord">
    </label>
    <button @click="sortType = 2">年龄升序</button>
    <button @click="sortType = 1">年龄降序</button>
    <button @click="sortType = 0">原顺序</button>
    <ul>
        <li v-for="p in blankPerson" :key="p.id">
            {{p.name}} - {{p.age}} - {{p.sex}}
        </li>
    </ul>
</div>
</body>
<script type="text/javascript">
    Vue.config.productionTip = false //阻止 vue 在启动时生成生产提示。

    const vm = new Vue({
        el: '#root',
        data: {
            keyWord: '',
            persons: [
                {id:'001',name:'马冬梅',age:19,sex:'女'},
                {id:'002',name:'周杰伦',age:21,sex:'男'},
                {id:'003',name:'周冬雨',age:20,sex:'女'},
                {id:'004',name:'温兆伦',age:22,sex:'男'}
            ],
            sortType: 0
        },
        methods: {
        },
        computed: {
            // 返回名字中带有空格的人信息
            blankPerson() {
                // 首先直接获取根据姓名过滤的结果
                const arr = this.persons.filter((p)=>{
                    return p.name.indexOf(this.keyWord) !== -1
                })
                // 再判断一下是否需要排序
                if(this.sortType){
                    arr.sort((p1,p2)=>{
                        return this.sortType === 1 ? p2.age-p1.age : p1.age-p2.age
                    })
                }
                return arr
            }
        }
    })
</script>
</html>